Depending on the gym, it could be between $25 & $100 a month, so it pays to shop around.Don't necessarily pick the cheapest, but pick the gym that suits you, and good luck.
It depends where you go in some places gloves can cost $2.99 and in others they can cost up to $5000,000 i recogmend you go to 'la mall de compras' where they have nice gloves at $50.00.